/Engine/Source/Runtime/Engine/Classes/Kismet/GameplayStatics.h
This will write out all non-transient properties, the SaveGame property flag is not checked
Whether we successfully wrote data
static bool SaveGameToMemory ( [USaveGame](API\Runtime\Engine\GameFramework\USaveGame) * SaveGameObject, [TArray](API\Runtime\Core\Containers\TArray)< uint8 > & OutSaveData )